Tobacco pipe with bowl actuated scraper



May 15, 1956 P. s. DoUMn-T TOBACCO PIPE WITH BWL ACTUATED SCRAPER Filed Sept. 29. 1952 //\//E/\/ TDF PHmP 5. DoUMtTT /4 TTUfF/vs/ United States Patent O TOBACCO PPE WITH BOWL ACTUATED SCRAPER Philip S. Doumitt, Portland, Oreg.

Application September 29, 1952, Serial No. 311,983

4 Claims. (Cl. 1151-184) This invention relates generally to tobacco pipes and particularly to a pipe having a bowl actuated scraper mechanism.

Heretofore tobacco pipes having bowl scraper mechanisms have been of two main types. In one type the scraper element within the bowl is operated by a shaft which extends through the bottom of the bowl, and in the other type the scraper element is operated by a handle located and exposed at the rim of the bowl of the pipe. The above-described scraper mechanisms mar the appearance of the pipe because parts thereof are exposed. Furthermore, such exposed parts tend to catch on the clothing of the person using the pipe. With bowls of the first type, liquids in the pipe tend to leak out through the bottom thereof around the scraper element operating shaft.

The main object of this invention is the provision of a tobacco pipe with a scraper and clean-out mechanism, which in no way alters the outward appearance of the pipe from those now in common use.

Another important object of this invention is to provide a tobacco pipe having a bowl scraper mechanism which has no parts exposed to catch on clothing, and in which there is no leakage problem.

A further object is to construct the pipe in a manner that the component parts are interlocking and are all easily produced and accessible for cleansing or replacement purposes.

I accomplish these and other objects in the manner set forth in the following speciication as illustrated in the accompanying drawing, in which- Fig. l is a plan of my pipe.

Fig. 2 is a section taken along the line 2--2 in Fig. l.

Fig. 3 is a section taken along the line 3-3 in Fig. 2.

Fig. 4 is a section taken along the line 4 4 in Fig. 2.

Fig. 5 is a side elevation of the scraper blade.

Fig. 6 is a perspective view of a snap ring used on the pivot of the scraper.

Fig. 7 is a perspective view of the mouthpiece and sleeve.

Fig. 8 is a transverse vertical section through a modified form of bowl, showing a means for retaining the bowl on the supporting base.

Like numbers of reference refer to the same or similar parts throughout the several views.

Referring in detail to the drawing, there is shown a pipe base 19 from which extends a stem 11, on the outer end of which is disposed a bit or mouthpiece 12 having projecting Vtherefrom a tubular sleeve 13 which extends through the stem 11 into a cylindrical chamber 14 formed in the base 1l?. The upper portion of the chamber, as the parts are depicted in Fig. 2, is del-ined by an internally threaded portion 15 of the base 10. The bit 12 has a duct 16 extending therethrough and communicating with the interior of the sleeve 13. The sleeve 13 has a plurality of cross draft slots 17 formed in the end opposite the bit 12, which slots are intersected by a longitudinal slot 18.

A generally cylindrical bowl 19 is detachably mounted v2,745,414 Patented May 15, 1956 on the base 10 for rotation about the vertical axis of said bowl by having an externally threaded, reduced lower end portion 27 threadedly fitting into the internally threaded portion 15 of the base 10. The bowl has a generally cylindrical cavity dened by a side wall 20 and a bottom wall 21. An insert 2S is press-fitted Within an axial hole formed in the bottom of the bowl 19, the insert having a plurality of draft holes 22 formed therethrough which are disposed around a central axial hole 23 in which is journaled a shaft 24 which forms part of the bowl scraper. The shaft is provided with a groove 25 in which a snap ring 26 ts, the snap ring bearing against the underside of the insert 28. The insert 28 is pressed into the threaded end 27 of the bowl 19.

On the upper end of the shaft 24 is secured a curved scraper blade 28A which bears against the curved bottom 21 and the interior wall of the cavity 20. The blade 28A and the snap ring 26 secure the scraper against axial vertical movement with respect to the bowl 19. The end 29 of the shaft 24V is flattened and normally fits within the slot 13. The shaft end 29 may be considered as a key. Thus, the sleeve 13 functions to secure the scraper against rotation with relation to the base, while the slots 17 form ports for the smoke.

The operation of this form of the device is as follows: When it is desired to clean the pipe, the mouthpiece 12 is left in place and the bowl 19 rotated with relation to the base 1@ in a direction to unthread the bowl from the base. Rotation of the blade 28A relative to base 10 is prevented bythe engagement of shaft end 29 with the tubular sleeve 13 but the sleeve permits the scraper to rise with the bowl as a unit as the `bowl is unthreaded. Thus, the blade 23A is caused to sweep along the inner side and bottom walls of the cavity 2t) to break up caked materials thereon and scrape the same clean. By withdrawing the bit 12 the entire pipe may be completely cleaned.

In the form shown in Fig. 8 the sleeve 13 does not extend into the chamber 30 but does extend into a stem on base 19A and does have its interior disposed in communication with said chamber. The stem is similar to stem 11 in Fig. 2, and the sleeve 13 has a mouthpiece connected thereto which is similar to mouthpiece 12 in Fig. 2. In this form the bowl 19A is provided with a tight tting insert 31 having draft holes 22A formed around the central shaft hole 23A in which is disposed a shaft 24A on whose upper end is secured the scraper blade 28B. The insert 31 is provided with a flange 32, which fits into a counterbore 33 in the bowl 19A. The end 34 of the shaft 24A is square and ts slidably into the square socket 35 in the screw 36, which is threaded loosely into the end 37 of the insert 31, the latter having a lower portion 39, as the parts are depicted in Fig. 8, rotatably extending into the base 10A. The screw 36 is threaded tightly into the base 10A and is concealed by a disk plug 38, preferably resembling the material in the base 13A.V The sleeve 13, which extends into the stern of the base 10A, terminates just short of the screw 36.

The operation of this form of the pipe is as follows: Upon rotation of the bowl 19A, the threaded connection between the screw 36 and the insert 31 causes the bowl, together with the insert 31 and the scraper blade 28B, to rise relative to the base 10A. The slidable t of the square shaft 34 in the socket 35 permits such rising movement but prevents the scraper blade 28B from rotating relative to the base 10A, thus to cause the blade to rotate with respect tothe bowl to scrape and clean the inner side wall of the bowl and the upper surface of the insert 31. Since the mouthpiece sleeve does not extend into the chamber 30, the mouthpiece may be removed before the bowl is cleaned if desired. The forms of the pipe disclosed in Figs. 2 and 8, therefore, dilfer primarily in that in the `with the bowl 19A.

Fig. 2 ferm f the invaont is the sleeve 13 whchicooperates with the shaft'end29r to prevent the scraper from rotating Arelative to the baseV while Yallowing it to rise with the bowl-as aV unit, whereas in they Fig. 8 form of the itivention-itis Vthe tof the square Vshaftlly Within` the square socketfftliefscrew'36 -that preventsrthe scrapertfror'rrV axial'movement with respect to said bowl, andV means i Yentirely within said base operatively connecting, said Yscraper andfbase for holdingsaid scraper against rotation relative to said basewhen said Vbowl Vis ,rotated thus causing said scraperY to sweep along theV inner wall of said` bowlV tocle'an it, thelast mentioned means axially slid- Yably connecting Asaid scraper to saidtbase toV provide for separation offsaid scraper from said'ba'se for Y,removal with said bowl. I Y

2;.'A`tobacco pipe comprising a base, a generally cylin-Y Y Vdrical bowl detachably threadedl-ytmounted on said, base forrrot'ation about'the verticalaxis ofsaid bowl, a scraper g "amants, Y "jf 3. A tobacco pipe comprisinga base, a generally cylin- Y ,'drical bowl detachably threadedly mounted on said base for rotation about the vertical wis of said bowl, the cavityV of said bowl being dened by an inner bottom wall and Y an inner side Wall, aV scraper mounted within and on said bowl Vfor rotation about saidY axis and having a YVportion extending along said innerbottorn'wall in contact'therewith'and another portion extending upwardly along said l inner side wall in Contact therewith, means securing said' scraperragainst axial movement with respect to said bowl, Y

said scraper Aincludingan axial key disposed below,v said bowl, andV means within :said basezcooperatively slidablyVV i engaging said key to prevent said scraper from rotating Y relative to said `base when Vsaidbowl `isrunthreaded but Y meansraxially slidably connecting said scraper to said base.

mounted in said bowl for rotation aboutsaid-Yaxis and arranged againstrthe inner wall of said bowl, means securing saidI scraper againstaxial Vmovement with respect to said bowl, and means holding saidscraperVagainstlrotaf tion relative to said base V when said bowl is unthreadedto t causesaid scraper to sweep along the inner wall'of Vsaid bowl Vto clean it,V said holding means slidably connecting .Y

said scraper to said base forfseparatingV movement in the: 'i direction of said axis to provide Vfor vremovalrofY Vsaid scraperwith'said bowl. Y, t r 'f f providing for separation ofvsaid scraper from said base for t removal with said bowl@V f Y VV 4. AV tobacco pipe comprising a base,l a generally cylindrical bowl detachably mounted on said basetforrrotation about'the vertical axis of said'bowl, a scraper mounted in said bowl for rotation about said axis and arranged against Vtrherinner wall lol'said bowl, means operatively connecting said Vscraperrand bowlfor s'ecuring'said scraper against v axial movement withl respect toVY saidl bowl, and means oper-r Y atively connecting Asaid scraper and base for holding said scraper'ag'ainst'rotation relative to said base when Vsaid bowlV is frotatedlthvus causing said scraper to sweep along the inner', wall of said bowl to `clean it, the last mentioned to provide for separation of said scraper from said Vbase for removal with said bowl. t i Y t 'i t ReferencesCited in the le of this patent Y UNITED SrATas PrrrnrtrsY 972,737 Tobias j Oct. 11', 1910 982,383'1 Meloun et al. Ian. 24, 1911 1,532,050 Drapaeau etal. 'Mar.,31, 1925 1,742,480 Mathison Jan. 7, 1930 2,136,745 Y Jellighaus Nov. 15,1938

`DiFedericoetal.' ,Aug. 25, 19537' Y 

